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DP-850 CT Sim & TPS QA phantom

Integrated Medical Technologies

DP-850 CT Sim & TPS QA phantom


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The DP-850 fully complies with AAPM TG-66 requirements for CT simulators as well as key components of AAPM TG-53 for treatment planning system quality assurance. It is constructed of a solid material with a relative density value of 0.85 (relative to water) as the background material. It consists of 4 primary modules that are assembled using rods of a density similar to trabecular bone around the periphery of the DP-850. To optimise functionality it contains various internal structures, test objects, fiducials and external alignment etchings.

CT SIMULATOR QA (AAPMTG-66)

  • Alignment & Orientation of Gantry Lasers to Center of Imaging Plane
  • Lateral Wall Laser Spacing to Lateral Gantry Lasers & Scan Plane
  • Orientation of Wall Lasers to Imaging Plane
  • Orientation of Ceiling Laser to Imaging Plane
  • Orientation of CT-Scanner Couch to Imaging Plane
  • Couch Vertical and Longitudinal Motion
  • Couch Indexing and Position
  • Gantry Tilt Accuracy
  • Gantry Tilt Position Accuracy
  • Scan Localisation
  • Radiation Profile Width
  • Sensitivity Profile Width
  • CT Number Constancy
  • Image Noise
  • In plane spatial integrity
  • Field uniformity
  • Spatial resolution
  • Contrast resolution

VIRTUAL SIMULATION TESTS

  • Hidden target localization accuracy
  • Contouring accuracy
  • Laser movement accuracy

TREATMENT PLANNING SYSTEM

  • Deformable Registration
  • DICOM transfer accuracy
  • Image quality verification (Resolution, CT number Constancy/Linearity, Uniformity)
  • Spatial integrity
  • Volume calculation accuracy
  • Margin creation accuracy
  • DRR spatial accuracy
  • DVH Accuracy
  • Dose Accuracy

TREATMENT IMAGING SYSTEM (kV, MV, & CBCT)

  • DICOM transfer accuracy
  • Volume transfer accuracy
  • Spatial integrity accuracy
  • TG -142 position/re-position test
  • TG -142 monthly

TREATMENT DELIVERY SYSTEM

  • Plan delivery accuracy (dose) for heterogeneous target and critical structures (Chamber, OSL, & Film Measurements)
  • Single chamber IMRT QA dose measurement
  • Target localisation delivery accuracy

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